The SIGMA SD1 is Sigma's flagship digital SLR model, adopting a lightweight yet solid magnesium alloy for its body and O-ring sealing connections to make a weather-resistant design throughout for use in harsh conditions.

46 megapixel 24Ā~16mm APS-C X3 Full-color image sensor
The 46 megapixel (4,800Ā~3,200Ā~3 layers) 24Ā~16mm APS-C X3 direct image sensor featured in the Sigma SD1 captures all primary RGB colors at each and every pixel location, ensuring the capture of full and complete color. Using three silicon-embedded layers of photo detectors, stacked vertically to take advantage of siliconĀfs ability to absorb red, green and blue light at different respective depths, it efficiently reproduces color more accurately, and offers sharper resolution, pixel for pixel, than any conventional image sensor. Since color moire is not generated, the use of a low-pass filter is not required, meaning light and color, generated by the 46 megapixel APS-C X3 direct image sensor is captured with a three-dimensional feel.

Optional lenses
The SD1 can be used with over 40 Sigma lenses such as ultra-wide, ultra-telephoto, macro and fisheyes which adopt the latest technology such as the FLD (“F” Low Dispersion) glass elements, which have the performance equal to fluorite glass, SLD glass, Aspherical lenses, Sigma's own unique Optical Stabilizer function, Hyper Sonic Motor and Sigma's Super Multi Layer Coating. They meet the various and demanding requirements of all types of photographers.

[SIGMA SD1 : Major Specifications]

Format

Interchangeable lens SLR camera

Storage Media

Compact Flash (Type I, UDMA compatible)

Image Sensor Size

24Ā~16mm

Lens Mount

SIGMA SA bayonet mount

Compatible Lenses

SIGMA SA mount interchangeable lenses

Angle of View

Equivalent to approx. 1.5 times the focal length of the lens (for 35mm cameras)